EP1787024B2 - Peristaltic pump tube - Google Patents

Peristaltic pump tube Download PDF

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Publication number
EP1787024B2
EP1787024B2 EP05758995.4A EP05758995A EP1787024B2 EP 1787024 B2 EP1787024 B2 EP 1787024B2 EP 05758995 A EP05758995 A EP 05758995A EP 1787024 B2 EP1787024 B2 EP 1787024B2
Authority
EP
European Patent Office
Prior art keywords
tube
phr
peristaltic pump
deformable
plasticizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05758995.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1787024A1 (en
EP1787024B1 (en
Inventor
Francesca Galavotti
Carlo Giannella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gambro Lundia AB
Original Assignee
Gambro Lundia AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Gambro Lundia AB filed Critical Gambro Lundia AB
Priority to PL05758995T priority Critical patent/PL1787024T5/pl
Publication of EP1787024A1 publication Critical patent/EP1787024A1/en
Application granted granted Critical
Publication of EP1787024B1 publication Critical patent/EP1787024B1/en
Publication of EP1787024B2 publication Critical patent/EP1787024B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating

Definitions

  • the invention relates to a tube for a peristaltic pump.
  • the invention can be usefully employed for transport of a liquid, for example a corporeal fluid (blood) and/or a medical fluid, in a medical apparatus, in particular in an apparatus for extracorporeal blood treatment, such as for example a dialysis apparatus.
  • a liquid for example a corporeal fluid (blood) and/or a medical fluid
  • a medical apparatus in particular in an apparatus for extracorporeal blood treatment, such as for example a dialysis apparatus.
  • deformable-tube peristaltic pumps for transport of liquids is known and widespread.
  • Some examples of deformable tubes used in peristaltic pumps are shown in patent publications US 4,080,113 , WO 89/04923 , WO 95/11383 , US 5,088,522 , EP 0 388 596 , US 5,242,279 .
  • a mobile device for example a rotor having at a periphery thereof two or more squeezing rollers
  • the tube has elastic return which enables the squeezing-pushing action to be repeated cyclically.
  • the deformable tube generally made of a relatively soft plastic material, such as for example plasticated PVC
  • the deformable tube is prone to considerable wear by effect of the squeezing and sliding pressure it is subjected to by the mobile device, with a consequent degrading of its characteristics, especially its mechanical characteristics, for example its elastic return capacity.
  • This has a considerable effect on the efficiency of the peristaltic pump over a long use time, causing the fluid flow along the tube to diminish progressively even where the squeezing-pushing action stays the same.
  • the progressive drop in performance of the peristaltic pump considerably limits the work time of the deformable tube.
  • the worn deformable tube is periodically replaced.
  • the deformable tube also known as the pump segment
  • the whole circuit has to be changed too, with consequent complications and a considerable impact on costs.
  • the variability over time of the peristaltic pump efficiency leads to a certain imprecision in the determination of the fluid flow, with a consequent need, in some cases, to set up elaborate flow control and regulation systems, especially in applications where the precision of the flow measure is essential, such as for example in medical apparatus in general, and in dialysis apparatus in particular, where control of the ultrafiltration flow and/or the infusion flow must be very precisely performed.
  • the present invention provides a tube for a peristaltic pump in accordance with claim 1, which is able to obviate the above limitations and drawbacks in the prior art.
  • An advantage of the invention is that it provides a deformable tube which, used in a peristaltic pump for transport of a fluid, maintains a high level of efficiency of fluid transport, i.e. a high flow rate in relation to the squeeze-and-push action, even after many hours of operation.
  • a further advantage is to make available a tube which is simple and economical to manufacture.
  • a further aim is to realise a fluid circuit for medical use, such as for example an extracorporeal blood circuit or a sterile fluid circuit, which is provided with a pump segment that is couplable to a peristaltic pump and which is also able to work, together with the pump, with a high-level performance for a long time.
  • a fluid circuit for medical use such as for example an extracorporeal blood circuit or a sterile fluid circuit, which is provided with a pump segment that is couplable to a peristaltic pump and which is also able to work, together with the pump, with a high-level performance for a long time.
  • the deformable tube is realized with a PVC resin-based material having a K value, measured according to ISO 1628-2, which is not less than 85, where the K value represents, as is known, an indicative measure of the PVC molecular weight.
  • the PVC resin used for manufacturing the deformable tube has a K value of more than 95, more specifically comprised between 97 and 105.
  • the quantity of plasticizer used in the PVC composition is comprised between 40 and 100 phr, i.e. parts in weight of plasticizer per 100 parts in weight of PVC resin. It has been found that the above range of plasticizer percentage values favours the obtaining of a deformable tube for peristaltic pumps offering excellent performance, in relation to the limitations in the drop in pump flow rate by effect of wear in the tube due essentially to the squeeze-push action of the pump on the tube.
  • the deformable tube is sterilized by irradiation using penetrating rays such as for example beta/gamma rays.
  • penetrating rays such as for example beta/gamma rays.
  • the resistance to penetrating rays of the PVC composition of the present invention is high.
  • 1 denotes in its entirety a tube for a peristaltic pump, comprising an elongate tubular body 2 which is elastically deformable by squeezing, and which is flexible.
  • the tubular body 2 has a cylindrical, smooth and continuous surface, and an internal surface which is also cylindrical, smooth and continuous, has a thickness of about 0.8 millimetre and an internal diameter of about 3.2 millimetres.
  • the tubular body 2 is made from a material containing at least a vinyl chloride resin and an least a plasticizer.
  • the tubular body 2 is made whole, in a single layer of the said material.
  • the PVC resin used has a K value, measured according to ISO 1628-2 standards, of not less than 85. More specifically, the resin has a K value, measured according to ISO 16282, of not less than 95. In laboratory testing, the results of which will be described herein below, a PVC resin was used that had a rated K value of 100.
  • the use of polymerized vinyl chloride with K above 95 is known, for example from DE 4317741 , for producing PVC formulations used in the thermoplastic manufacturing of soft elasticized products by extrusion, pressing, calendering or sintering.
  • the material of the tubular body 2 contains a quantity of plasticizer which is not above 100 phr, where phr means parts in weight per hundred parts of resin.
  • the plasticizer content is also above 40 phr.
  • the content in weight of plasticizer in the tubular body 2 is comprised between 50 and 80 phr.
  • the material of the tubular body contains about 75.5 phr of plasticizer.
  • the plasticizer used is a monomer.
  • the plasticizer comprises, in particular, a derivative of adipic acid. More specifically, the derivative can be an alkyl ester of adipic acid, such as for example di-2-ethyl-hexyl-adipate, commonly known as DOA or DEHA.
  • DOA di-2-ethyl-hexyl-adipate
  • DEHA DEHA
  • a formulation of the material used for realising the tubular body 2 is the following::
  • Lubricant suitable for PVC mixtures can be used.
  • Ca/Zn stabilizers based on calcium and zinc.
  • a usable co-stabilizer is, for example, epoxy soya oil (ESO), although other types of known co-stabilizers suitable for PVC can be used.
  • ESO epoxy soya oil
  • the deformable tube can be sterilized using any known sterilization process, such as for example using penetrating beta/gamma rays or ethylene oxide.
  • the above-illustrated PVC composition exhibits good resistance to penetrating rays.
  • FIG. 2 schematically shows a peristaltic pump 3 for transport of a fluid, using a deformable tube 1 such as the one described above.
  • the peristaltic pump 3, which in the embodiment is rotary, comprises a rotor 4 provided with a plurality of squeezing rollers 5, a stator 6 external of the rotor, and a deformable tube arranged between the rotor 5 and the stator 6.
  • the deformable tube is inserted in a fluid transport line 7 which can be, for example, a line for extracorporeal blood transport, or an infusion line for a medical fluid, or a dialysis fluid supply line to a dialyzer filter, or an out-flowing discharge fluid drainage line from a blood treatment unit, and so on.
  • Figure 3 shows, schematically, a set for fluid transport in an extracorporeal blood treatment; more specifically it shows a set for extracorporeal blood transport for a dialysis treatment.
  • the set comprises an arterial line 8, provided with a pump segment 9 realized by the tube of the present invention, and a venous line 10, each provided with one end, respectively 81 and 101, for connection to the blood circulation system of a patient, and another end, respectively 82 and 102, for connection to a blood treatment unit (of known type and not illustrated).
  • the tube of the invention is for coupling a peristaltic pump of the type which is operatively associated, in particular, to apparatus for extracorporeal blood treatment, such as for example apparatus predisposed to perform one or more of the following treatments: hemodialysis, hemofiltration, therapeutic plasma exchange, hemodiafiltration, pure ultrafiltration.
  • These apparatus can be of a type suitable for intensive treatment of kidney failure, or of a type suitable for periodic treatments.
  • the tube of the invention is further couplable with peristaltic pumps suitable for other medical uses such as, for example, apparatus for infusion of a medical fluid into a patient where there is the presence of at least one peristaltic pump.
  • a deformable tube for a peristaltic pump was manufactured using the following PVC formulation:
  • the tube was made by extrusion of a blend of the above ingredients.
  • the blend was heated to a temperature of between 120 and 150°C to enable good blending of the various components, after which the resulting dry blend was used for extrusion of the tube.
  • Extrusion temperature for the deformable tube was about 160-180 °C.
  • Tube dimensions are those of the tube 1 of figure 1 .
  • the extruded tube was then sterilized using ethylene oxide and applied together with a rotary peristaltic pump of a dialysis machine for various operational hours.
  • the diagram of figure 4 shows, on the horizontal axis, the operational time expressed in hours, and on the vertical axis the drop in the test fluid flow rate through the peristaltic pump, expressed in percentage terms with respect to the initial flow rate with the tube when not in a worn state.
  • the above improvement is particularly evident in use with peristaltic pumps with deformable tubes, where, during use, the negative pressure at pump inlet Pin is less than about -20 mmHg.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Dermatology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • External Artificial Organs (AREA)
  • Reciprocating Pumps (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP05758995.4A 2004-09-06 2005-07-06 Peristaltic pump tube Active EP1787024B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05758995T PL1787024T5 (pl) 2004-09-06 2005-07-06 Rurka pompy perystaltycznej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000223A ITMO20040223A1 (it) 2004-09-06 2004-09-06 Tubo per una pompa peristaltica.
PCT/IB2005/001919 WO2006027647A1 (en) 2004-09-06 2005-07-06 Peristaltic pump tube

Publications (3)

Publication Number Publication Date
EP1787024A1 EP1787024A1 (en) 2007-05-23
EP1787024B1 EP1787024B1 (en) 2009-11-18
EP1787024B2 true EP1787024B2 (en) 2021-06-16

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ID=35044599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05758995.4A Active EP1787024B2 (en) 2004-09-06 2005-07-06 Peristaltic pump tube

Country Status (12)

Country Link
US (3) US10563646B2 (ko)
EP (1) EP1787024B2 (ko)
KR (1) KR101142713B1 (ko)
CN (1) CN100510399C (ko)
AT (1) ATE449259T1 (ko)
AU (1) AU2005281464B2 (ko)
CA (1) CA2577814C (ko)
DE (1) DE602005017798D1 (ko)
ES (1) ES2336805T5 (ko)
IT (1) ITMO20040223A1 (ko)
PL (1) PL1787024T5 (ko)
WO (1) WO2006027647A1 (ko)

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US10850024B2 (en) 2015-03-02 2020-12-01 Icu Medical, Inc. Infusion system, device, and method having advanced infusion features
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DE102016210106A1 (de) 2016-06-08 2017-12-14 Raumedic Ag Materialzusammensetzung für einen Schlauchkörper sowie Schlauch mit einem Schlauchkörper mit einer derartigen Zusammensetzung
WO2017211870A1 (de) 2016-06-08 2017-12-14 Raumedic Ag Materialzusammensetzung für einen schlauchkörper sowie schlauch mit einem schlauchkörper mit einer derartigen zusammensetzung
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EP3468635B1 (en) 2016-06-10 2024-09-25 ICU Medical, Inc. Acoustic flow sensor for continuous medication flow measurements and feedback control of infusion
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US11014697B2 (en) * 2019-06-03 2021-05-25 Vanrx Pharmasystems Inc. Peristaltic pump-based apparatus and method for the controlled dispensing of fluids
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US12075860B1 (en) * 2020-01-10 2024-09-03 Oceanit Laboratories, Inc. High-performing liquid-cooled apparel
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CN101023268A (zh) 2007-08-22
KR20070050974A (ko) 2007-05-16
US20210324842A1 (en) 2021-10-21
ATE449259T1 (de) 2009-12-15
CN100510399C (zh) 2009-07-08
US11060516B2 (en) 2021-07-13
AU2005281464A1 (en) 2006-03-16
CA2577814C (en) 2013-10-22
WO2006027647A1 (en) 2006-03-16
ITMO20040223A1 (it) 2004-12-06
PL1787024T5 (pl) 2021-10-11
PL1787024T3 (pl) 2010-04-30
KR101142713B1 (ko) 2012-05-11
AU2005281464B2 (en) 2011-01-20
EP1787024A1 (en) 2007-05-23
ES2336805T3 (es) 2010-04-16
EP1787024B1 (en) 2009-11-18
US10563646B2 (en) 2020-02-18
US20200182232A1 (en) 2020-06-11
US20080188789A1 (en) 2008-08-07
ES2336805T5 (es) 2021-12-03
DE602005017798D1 (de) 2009-12-31
US12025115B2 (en) 2024-07-02

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